:root {
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  font-weight: 500;
  color: #646cff;
  text-decoration: inherit;
  transition: color 0.2s;
}
a:hover {
  color: #535bf2;
}

body {
  margin: 0;
  display: flex;
  place-items: center;
  min-width: 320px;
  min-height: 100vh;
  font-family: 'Segoe UI', 'PingFang SC', 'Hiragino Sans', 'Arial', sans-serif;
  background: linear-gradient(135deg, #e3f0ff 0%, #f9f9ff 100%);
  color: #222;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #1a1a1a;
  cursor: pointer;
  transition: border-color 0.25s;
  background: #409eff;
  color: #fff;
  border: none;
  padding: 8px 16px;
  transition: background 0.2s;
}
button:disabled {
  background: #bcdcff;
  cursor: not-allowed;
}
button:not(:disabled):hover {
  background: #1976d2;
}
button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

.card {
  padding: 2em;
}

#app {
  width: 100vw;
  margin: 0 auto;
  padding: 0;
}

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: #ffffff;
  }
  a:hover {
    color: #747bff;
  }
  button {
    background-color: #f9f9f9;
  }
}

input {
  border: 1px solid #dcdfe6;
  border-radius: 6px;
  padding: 8px;
  outline: none;
  transition: border 0.2s;
  font-size: 15px;
}
input:focus {
  border-color: #409eff;
}

/* 页面切换淡入淡出动画 */
.fade-enter-active, .fade-leave-active {
  transition: opacity 0.3s;
}
.fade-enter-from, .fade-leave-to {
  opacity: 0;
}

/* 优化滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
  background: #f0f0f0;
}
::-webkit-scrollbar-thumb {
  background: #bcdcff;
  border-radius: 4px;
}
